Of course you are gonna loose a lot of games... Maybe 50% assuming the Alliance are about as good as you. So the number of games played need to be adjusted. Let's assume that your team is able to gather an average of ~800 resources for each loss. With this estimate you will get an average of 60 reputation per game.

=> Estimated number of games needed = 42000/60 = 700

GLHF

Comment by Kanoi

Patch notes for 3.3 state that this achievement will no longer be necessary to fulfill Master of Arathi Basin. Instead, a to-be-announced reward title will be given for completion.

Comment by eli2112

which actually makes me want it MORE

Comment by kylex3

It took me 355 Arathi basins and the 2 quests from hammerfall, arathi highlands. (horde)

Comment by Runeweaver

Note that unlike what Kanoi said you DO NOT recieve any title for being exalted with any Battleground faction

Comment by HelloKitty

I'd like to provide some actual statistical data on this. About ~70% of this data taken from Cho'gall (BG7) with the remaining 30% taken from Ner'zhul (BG9). Both BGs seemed to win about the same amount (Horde > 50%, with BG9 seeming SLIGHTLY more consistent).

The purpose of this is to take into account what I might contribute to the "normal" amount of times people leave an AB early, play on AB weekend, join a game late, how much rep you gained even in a loss, or the fact that Horde and Alliance do not win at a 50:50 ratio. Things you cannot possibly consider unless you get some empirical evidence.

I am 300/1000 Exalted at the moment. I did the quests Take Four Bases (1k rep) and The Battle for Arathi Basin! (500 rep).

42300 - 1500 = 40800.

With 40800 rep grinded in total, I played 515 ABs -- 278 wins with 237 losses.

Average rep/game = 40800/515 = 79.22 rep

Edit: Bear in mind, this is pre-cata guild perks, and is just to give you a ballpark sense. Better downrate me for trying to be helpful.

Comment by jolkin72

I know newb question but does anyone know whether this achievement grants "the Defiler" title? (i've heard both responses from people and i want to make sure)

Comment by Juzard

That way you'll get lot of extra rep saving you up to 1 battle of rep worth ^^

Comment by Nulgar

I don't think Contradiktionz had this in mind, especially as faction change didn't exist yet when they wrote the post, but you could technically change your character to a Human to farm the Arathi and Warsong factions, unless you're a shaman or druid, or Alliance sucks at least so much on your battlegroup that staying Horde is more profitable.

Comment by Isiwien

General facts and other neat information around Arathi Basin and the reputation grind:

During Call to Arms: 11 ticks × 11 reputation = 121 rep for a full victory.

Does it matter whether you win or lose the BG? Regarding reputation gains.No, the only thing that matters is whether you reach the required resources or not.E.g. Reaching 160, 320 etc or during CtA reaching 140, 280 etc. Of course you'll get more honor for winning.

How does this work if you have both Mr. Popularity + Diplomacy (Alliance only of course)?They should be stacking and you should be getting 12 reputation per tick. Not quite sure about the exact number if they are both based on the base amount of rep or if they are based on eachother.

Are there any quests you can get extra reputation from?Yes there are three quests. These are the same quests that have been in the game since Vanilla though, so you might have done them even though you might not remember it. The quests are avalible from Hammerfall (H) and Refuge Point (A) in Arathi Highlands.One NPC per faction gives all quests:

There are one or two more quests called Standard/Advanced Care Package but they only award 10 reputation.And no, Blizzard has no plans what so ever to change this reputation system. They like how this is in AB+WSG and would like to keep it as one of the few über grinds in game. The only fact we can rely on is that RNGesus plays a very little role in this reputation grind...

Updates as of 4.2It appears that reputation gains has been reduced by approximately 30%.You now get reputation during normal days for full victories:

Closing words: I've quite enjoyed farming the tabard for a second time. It's definitely worth stopping your xp at level 24 for 2-3 weeks just for the purpose of getting exalted with the defilers/obtaining this beauty of a tabard. I can't really judge how long it would take to farm this particular reputation at max level due the fact that I haven't really played max level in ages but I'm just gonna assume that it would take much longer than 2 weeks.